4156906978 has 24 divisors (see below), whose sum is σ = 7438027968. Its totient is φ = 1703599392.

The previous prime is 4156906939. The next prime is 4156906979. The reversal of 4156906978 is 8796096514.

It is not an unprimeable number, because it can be changed into a prime (4156906979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1155150 + ... + 1158742.

It is an arithmetic number, because the mean of its divisors is an integer number (309917832).

Almost surely, 2^4156906978 is an apocalyptic number.

4156906978 is a deficient number, since it is larger than the sum of its proper divisors (3281120990).

4156906978 is an frugal number, since it uses more digits than its factorization.

4156906978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7218 (or 3625 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 4156906978 is about 64474.0798926204. The cubic root of 4156906978 is about 1607.8916086707.

The spelling of 4156906978 in words is "four billion, one hundred fifty-six million, nine hundred six thousand, nine hundred seventy-eight".